Company lists · Data refreshed September 2026
Top 25 Information security consulting services based in Seattle, United States
RevenueBase identified 79 information security consulting services headquartered in Seattle, United States as of September 2026 and tracks 506 professional contacts across them, including 255 with verified work emails. Across the United States, New York is the largest hub for this category (305 companies); Seattle has 79.
This list covers information security consulting services headquartered in Seattle, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest information security consulting services based in Seattle, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 107 contacts → | ||||
Partial evidence “IOActive is a trusted partner for Global enterprises, providing research-fueled security services across all industries.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 39 contacts → | ||||
Strong evidence “Anvil is an information security consulting firm focused on top tier consulting.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 36 contacts → | ||||
Partial evidence “Kalles Group partners with CIOs, CISOs, and security leaders to strengthen security programs, reduce operational risk, and build resilience during periods of change.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 33 contacts → | ||||
Partial evidence “Advantage Partners is a security & compliance organization dedicated to helping emerging technology companies navigate the complexities of security and compliance.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 27 contacts → | ||||
Partial evidence “We are a cybersecurity company specializing in governance, risk management and compliance, Cloud Security, and Application Security.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 24 contacts → | ||||
Indirect evidence “Dynamic Computing helps companies and organizations in Seattle and across the Puget Sound region achieve their goals through technology.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 22 contacts → | ||||
Partial evidence “DSE is a boutique security firm with a focus on Active Directory.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 21 contacts → | ||||
Partial evidence “Copperhead Consulting is a team of highly capable Agents, Investigators, Special Operations Veterans and technical professionals.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 20 contacts → | ||||
Indirect evidence “SWAT Systems is now Convergence Networks!” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 15 contacts → | ||||
Indirect evidence “Interplay IT is a trusted, Seattle-based IT partner specializing in Architecture, Engineering, Construction, and Mission-Driven Nonprofits.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 13 contacts → | ||||
Strong evidence “Markgraf Consulting is a premier technology consulting firm specializing in SAP security, cloud solutions, and system architecture.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 8 contacts → | ||||
Strong evidence “Founded in 1998, Fostec is a client-focused Information Technology consulting firm that designs solutions and provides technical expertise to small and mid-sized businesses…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 7 contacts → | ||||
Partial evidence “Forge Technology Advisors provides a customized suite of IT and Telecommunications consulting services-including Cybersecurity, SASE, UCaaS, CCaaS, and Networking-tailored to meet…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 7 contacts → | ||||
Partial evidence “Vivid Technical Consulting makes cybersecurity compliance achievable for every contractor in the defense industrial base.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5 contacts → | ||||
Partial evidence “Intelligent Technical Solutions is your trusted business partner for all your Cybersecurity, Managed and Co-managed IT support, Risk & Compliance, Data Analytics, and Consulting…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 4 contacts → | ||||
Indirect evidence “Enetics Networks was founded in 1998 to provide smart, cost-effective technology solutions for businesses throughout Washington state.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 4 contacts → | ||||
Indirect evidence “Trusted IT support, strategy, and cybersecurity for small businesses.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4 contacts → | ||||
Indirect evidence “Building bridges to a more secure digital future through education, evaluations, designs & preparation.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 3 contacts → | ||||
Strong evidence “We are an IT consulting team that partners with clients to elevate their IT security skills and knowledge in crafting, deploying, and supporting intelligent and leading-edge IP…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 3 contacts → | ||||
Partial evidence “At Positroniq, we help to protect organizations through assessment and advisory services designed to improve security, risk, and compliance programs and processes.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Indirect evidence “VCTO Secure empowers clients by Making I.T.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Partial evidence “Zove Security secures the products and platforms that power innovation and underpin all our digital lives.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2 contacts → | ||||
Strong evidence “Culper Partners offers strategic business consulting at the intersection of technology, national security, law enforcement, public policy and regulation.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2 contacts → | ||||
Indirect evidence “CMMC 2.0 and NIST 800-171v2” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2 contacts → | ||||
Indirect evidence “Section9Labs is a startup based in Seattle, WA.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: information security consulting services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names information security consulting services.
- Partial evidence
- Its own public description names part of information security consulting services, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name information security consulting services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 79 information security consulting services based in Seattle, United States
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 255 reachable decision-makers.
Free signup · no credit card
Information security consulting services based in Seattle, United States at a glance
As of Sep 28, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 79 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among information security consulting services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Seattle, United States whose own description of what they do matches “information security consulting services”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names information security consulting services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among information security consulting services, and records with no verified work email. Companies headquartered outside Seattle are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 255 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 28, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Information security consulting services by metro in the United States
- Information security consulting services in New York305
- Information security consulting services in Houston200
- Information security consulting services in Atlanta185
- Information security consulting services in Washington168
- Information security consulting services in Dallas151
- Information security consulting services in Austin149
- Information security consulting services in Chicago145
- Information security consulting services in Miami126
- Information security consulting services in San Francisco110
- Information security consulting services in Tampa106
- Information security consulting services in Los Angeles105
- Information security consulting services in San Diego102
- Information security consulting services in Denver88
- Information security consulting services in Boston86
- Information security consulting services in Arlington84
- Information security consulting services in Charlotte78
- Information security consulting services in Alexandria71
- Information security consulting services in Las Vegas64
- Information security consulting services in Orlando64
- Information security consulting services in Phoenix64
- Information security consulting services in San Antonio62
- Information security consulting services in Columbia57
- Information security consulting services in Reston57
- Information security consulting services in Raleigh56
- Information security consulting services in Portland51
- Information security consulting services in Ashburn49
- Information security consulting services in Mclean49
- Information security consulting services in Columbus48
- Information security consulting services in Minneapolis48
- Information security consulting services in Baltimore46
- Information security consulting services in Fairfax46
- Information security consulting services in Plano46
- Information security consulting services in Richmond45
- Information security consulting services in Wilmington45
- Information security consulting services in Fort Lauderdale43
- Information security consulting services in Irvine43
- Information security consulting services in Frisco42
- Information security consulting services in Herndon42
- Information security consulting services in Indianapolis42
- Information security consulting services in San Jose42
- Information security consulting services in Colorado Springs41
- Information security consulting services in Huntsville40
- Information security consulting services in Sheridan40
- Information security consulting services in Nashville39
- Information security consulting services in Pittsburgh38
- Information security consulting services in Philadelphia37
- Information security consulting services in Scottsdale36
- Information security consulting services in Rockville33
- Information security consulting services in Alpharetta31
- Information security consulting services in Sacramento30
- Information security consulting services in Chantilly27
- Information security consulting services in Jacksonville27
- Information security consulting services in Tucson27
- Information security consulting services in Bethesda25
- Information security consulting services in Cleveland25
- Information security consulting services in Vienna25
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names information security consulting services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many information security consulting services are there based in Seattle, United States?
RevenueBase identified 79 information security consulting services headquartered in Seattle, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Ioactive, INC, headquartered in Seattle, tops this list with the largest team on record.
Which city in the United States has the most information security consulting services?
New York leads the United States with 305 headquartered companies, followed by Houston (200) and Atlanta (185). Seattle has 79.
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 255 verified decision-maker contacts tracked across these 79 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.
Ready to reach these companies? Verified emails and direct dials for all 79 information security consulting services based in Seattle, United States. Start with a free account, no credit card.
Download this list →Related lists
Information security consulting services by geography
- Information security consulting services based in Buenos Aires, Argentina
- Information security consulting services based in Adelaide, Australia
- Information security consulting services based in Brisbane, Australia
- Information security consulting services based in Canberra, Australia
- Information security consulting services based in Melbourne, Australia
- Information security consulting services based in Perth, Australia
- Information security consulting services based in Sydney, Australia
- Information security consulting services based in Wien, Austria
- Information security consulting services based in Dhaka, Bangladesh
- Information security consulting services based in Barueri, Brazil
- Information security consulting services based in Belo Horizonte, Brazil
- Information security consulting services based in Brasilia, Brazil
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Information security consulting services based in Buenos Aires, Argentina
- Information security consulting services based in Adelaide, Australia
- Information security consulting services based in Brisbane, Australia
- Information security consulting services based in Canberra, Australia
- Information security consulting services based in Melbourne, Australia
- Information security consulting services based in Perth, Australia